book Maths Puzzle Numerical Ability

I need to convert the following into an excel formula and I don't remember where to start. Can you help?

Question: I have one bucket w/ 50 apples of which 15 are yellow and 35

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book Other Question

how would you do that if the power is outside of the ( ). for example (2+15)
and then the power would be on the top.
I am having trouble with this question, Find the lowest common denominator of p+3
----------
p^2+7p+10

and
p+5
----------
p^2+5p+6

Can someone please help me?